TITLE:
Root Growth, Nutrition and Yield of Maize with Applied Finely Limestone in Surface of Cerrado Soil
AUTHORS:
Rafael Felippe Ratke, Hamilton Seron Pereira, João de Deus Gomes dos Santos Junior, Joaquim José Frazão, Juliano Magalhães Barbosa, Bruno de Oliveira Dias
KEYWORDS:
Particle Size; No-Tillage; Limestone
JOURNAL NAME:
American Journal of Plant Sciences,
Vol.5 No.6,
March
25,
2014
ABSTRACT:
The surface applies lime to correcting soil acidity in no-tillage and promotes root
development and yield of maize. However, limestone with a particle size smaller
than 0.30 mm cannot promote this effect. The aim of this study was to determine
the root attributes, nutrition and productivity of maize with limestone ground
in no-tillage. The experimental design was randomized blocks with five
treatments and four replications. The treatments consisted of different
particle sizes of limestone applying superficially to the soil under NT 0) control, without lime,
1) 0.30 mm to 0.20 mm 2) 0.20 mm to 0.10 mm, 3) 0, 10 mm to 0.05 mm 4) 0.05 mm
to 0.01 mm. Attributes root, leaf nutrition and grain yield of maize were
evaluated in two years 2009 and 2010. The elongation of roots in a 20-40 cm depth was greater when using limestone
with particle size between 0.30 mm and 0.20 mm. The root length of maize plants
correlated with the levels of Mn in maize leaves. The root development promoted
by liming effect was not reflected in the productivity of maize.